Collect.js unless() Method
The unless() method is executes the callback provided when false is evaluated by the first argument given to the method.
Syntax:
collect.unless()
Parameters: The collect() method takes one argument that is converted into the collection and then unless() method is applied on it.
Return Value: This method returns the merged collection elements.
Below example illustrate the unless() method in collect.js:
Example 1:
Javascript
const collect = require( 'collect.js' );
let arr = [ 'C++' , 'java' , 'python' ];
const collection = collect(arr);
collection.unless( false , items => items.push( 'c#' ));
let newObject = collection.all();
console.log(newObject);
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Output:
["C++", "java", "python", "c#"]
Example 2:
Javascript
const collect = require( 'collect.js' );
let arr = [1, 2, 3, 4];
const collection = collect(arr);
collection.unless( false ,
items => items.push(5, 6, 7));
let newObject = collection.all();
console.log(newObject);
|
Output:
[1, 2, 3, 4, 5, 6, 7]
Last Updated :
03 Dec, 2020
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